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1. 1:1,000,000-Scale County Boundaries of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).

2. 1:1,000,000-Scale National Wilderness Preservation System of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile consists of National Wilderness Preservation System areas of 320 acres or more, in the United States, Puerto Rico, and the U... National Atlas of the United States.

3. 1:1,000,000-Scale State Boundaries of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

4. 1:1,000,000-Scale Waterbodies and Wetlands of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile represents waterbodies and wetlands of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was produc... Geological Survey (U.S.).

5. Global Map: 1:1,000,000-Scale Inland Water Areas of the United States, 2014

2014. Geological Survey (U.S.). This polygon shapefile includes Global Map data showing waterbodies and wetlands of the United States, Puerto Rico, and the U.S. Virgin Islands. Th... Geological Survey (U.S.).

6. Global Map: 1:1,000,000-Scale Political Areas of the United States, 2014

2014. National Atlas of the United States. This polygon shapefile includes Global Map data showing the counties and equivalent entities of the United States, Puerto Rico, and the U.S. Virgin... National Atlas of the United States.

7. 1:1,000,000-Scale Combined Statistical Areas, 2013

2013. National Atlas of the United States. This polygon shapefile contains combined statistical areas in the United States and Puerto Rico. Combined statistical areas consist of two or more ... National Atlas of the United States.

8. 1:1,000,000-Scale Core Based Statistical Areas, 2013

2013. National Atlas of the United States. This polygon shapefile contains core based statistical areas in the United States and Puerto Rico. The map layer was created from the CENSUS 2010 T... National Atlas of the United States.

9. 1:1,000,000-Scale State Boundaries of the United States, 2012

2012. National Atlas of the United States. This polygon shapefile portrays the state boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by e... National Atlas of the United States.

10. Seismic Hazard Map for the United States

2012. Rukstales, Kenneth S. (compiler). This polygon shapefile represents seismic hazards in the United States. The data represent a model showing the probability that ground motion will ... National Atlas of the United States.

11. Flood Insurance Risk Zones, Alabama, 2011

2011. The flood insurance risk zone layer contains information about the flood hazards for Alabama. These zones are used by the federal Emergency Managem...

12. Alabama voting districts from 2010 Census

2010. US Census Bureau, Geography Division. Voting districts in Alabama based on the US decennial Census of 2010. The TIGER/Line shapefiles and related database files (.dbf) are an extract of...

13. Public Land Survey System of the United States, 2010

2010. Geological Survey (U.S.). This polygon shapefile portrays the Public Land Surveys of the United States, including areas of private survey, donation land claims, and land gra... Geological Survey (U.S.).

14. Voting Districts AL 2010

2010. This polygon data layer represents the 2010 TIGER/Line voting districts for Alabama. The TIGER/Line Files are shapefiles and related database files...

15. Voting Districts TX 2010

2010. This polygon data layer represents the 2010 TIGER/Line voting districts for Alabama. The TIGER/Line Files are shapefiles and related database files...

16. Agriculture Census of the United States, 2007

2007. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2007 Census of Agriculture by the National Agricultural St... National Atlas of the United States.

17. Indian Lands of the United States, 2006

2006. National Atlas of the United States. This polygon shapefile shows Indian lands of the United States. Only areas of 640 acres or more are included. Federally-administered lands within a... National Atlas of the United States.

18. Areas and Facies Types of Metamorphism: Geology of the Conterminous United States, 2005

2005. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This line shapefile shows the outlines of major calderas and impact structures in the United States. This layer is part of the Geologic Map of the ... Geological Survey (U.S.).

19. Fees and Easements, Alabama, Protected Areas Database of the United States, 2005-2016

2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Alabama. The USGS Protected Areas Database of the United States (PAD... Gap Analysis Program (U.S.).

20. Fees and Easements, LCC 14, Protected Areas Database of the United States, 2005-2016

2005. Gap Analysis Program (U.S.). This polygon shapefile contains combined PAD-US Fee and Easements features for Landscape Conservation Cooperative (LCC) 14. The USGS Protected Area... Gap Analysis Program (U.S.).

21. Quaternary Fault and Fold Database of the United States (Polygons)

2005. Geological Survey (U.S.). This map layer contains locations and information on faults and associated folds, in the United States, that are believed to be sources of signific... National Atlas of the United States.

22. Bailey's Ecoregions and Subregions of the United States, 2004

2004. United States. Forest Service. This polygon shapefile is commonly called Bailey's ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.... National Atlas of the United States.

23. National Fire Plan - Hazardous Fuels Reduction Program, 2004

2004. National Atlas of the United States. This polygon shapefile portrays county level data for the fiscal-year-2004 National Fire Plan - Hazardous Fuels Reduction Program. The purpose of t... National Atlas of the United States.

24. North American Atlas - Bathymetry (Polygons)

2004. Instituto Nacional de Estadística, Geografía e Informática (Mexico), Canada Centre for Mapping, and Geological Survey (U.S.). This polygon shapefile contains bathymetric data with depth in metres for ocean areas covered by the extent of the North American Atlas project. Is... Canada Centre for Mapping.

25. Omernik's Level III Ecoregions of the Continental United States, 2003

2003. United States. Environmental Protection Agency. This polygon shapefile shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of... National Atlas of the United States.

26. Principal Aquifers of the 48 Conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islands

2003. Geological Survey (U.S.). Water Resources Division. Wisconsin District. This polygon shapefile contains the shallowest principal aquifers of the conterminous United States, Hawaii, Puerto Rico, and the U.S. Virgin Islan... Geological Survey (U.S.).

27. Agriculture Census of the United States, 2002

2002. National Atlas of the United States. This polygon shapefile portrays a selected set of information that was collected for the 2002 Census of Agriculture by the National Agricultural St... National Atlas of the United States.

28. Coal Fields of the United States

2001. Eastern Energy Resource Surveys Team (Geological Survey). This polygon shapefile shows the coal fields of Alaska and the conterminous United States. Most of the material for the conterminous United States ... National Atlas of the United States.

29. Costly Regional Landslide Events in the United States

2001. Godt, Jonathan W. This polygon shapefile contains information on costly regional landslide events in the 50 United States and Puerto Rico. The extents of the regiona... National Atlas of the United States.

30. Hazardous Waste, Generated, Shipped, Received 2001-2007

2001. National Atlas of the United States. This polygon shapefile portrays the hazardous waste generated, shipped, and received by state and other areas within the United States, Puerto Rico... National Atlas of the United States.

31. Landslide Incidence and Susceptibility in the Conterminous United States

2001. Geological Survey (U.S.) and Godt, Jonathan W. These polygon shapefile is a digital version of U.S. Geological Survey Professional Paper 1183, Landslide Overview Map of the Conterminous United S... National Atlas of the United States.

32. Urban Areas of the United States, 2001

2001. Geological Survey (U.S.). This data set includes a selection of urban areas in the United States derived from the urban areas layer of the Digital Chart of the World (DCW). ... Geological Survey (U.S.).

33. County Boundaries of the United States, 2000

2000. Geological Survey (U.S.). This polygon shapefile portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

34. UA Census American Indian Reservations, 2000 - Alabama

2000. This datalayer depicts feature location and other associated data for American Indian tribal entities for those entities established on January 1, ...

35. UA Census Block Groups, 2000 - Alabama

2000. The polygons represent U.S. Census Block Groups for the state based on the ground condition of January 1, 2000. Block Groups (BGs) are clusters of ...

36. UA Census Blocks, 2000 - Alabama

2000. The polygons in this datalayer represent U.S. Census Blocks for the entire state. Census blocks are statistical areas bounded on all sides by visib...

37. UA Census Collection Blocks, 2000 - Alabama

2000. The polygons in this datalayer represent Census Collection Blocks for the entire state. To improve operational efficiency and geographic identifica...

38. UA Census Congressional Districts, 2000 - Alabama

2000. The polygons represent Congressional Districts for the state based on the congressional districts in effect at the time of Census 2000, which are t...

39. UA Census Counties, 2000 - Alabama

2000. This datalayer displays the counties for the state, based on a ground condition of January 1, 2000. The primary legal divisions of most states are ...

40. UA Census County Subdivisions, 2000 - Alabama

2000. This datalayer displays County Subdivisions for the state, based on legal and statistical entities established on January 1, 2000. County subdivisi...

41. UA Census Key Geographic Locations, 2000 - Alabama

2000. This datalayer displays Key Geographic Locations (KGLs), as defined by the US Census Bureau, throughout the state. Essential attribute data include...

42. UA Census Landmark Polygon Features, 2000 - Alabama

2000. This datalayer displays polygon landmark features throughout the state. "Landmark" is the general name given to a cartographic (or locational) land...

43. UA Census Metropolitan Statistical Areas, 2000 - Alabama

2000. This datalayer displays Metropolitan Statistical Areas (MSAs) for the state. MSAs are Metropolitan Areas (MAs) that are not closely associated with...

44. UA Census Places, 2000 - Alabama

2000. This datalayer displays the Census Places for the state based on the ground condition of January 1, 2000. Places, for the reporting of decennial ce...

45. UA Census Public Use Microdata Areas, 2000 - Alabama

2000. This datalayer displays the Public Use Microdata Areas (PUMAs) for the state. A public use microdata area is a decennial census area for which the ...

46. UA Census State Legislative Districts (Lower Chamber), 2000 - Alabama

2000. This layer displays the legislative districts for the lower (House of Representatives) chamber for the state. State legislative districts (SLDs) ar...

47. UA Census State Legislative Districts (Upper Chamber), 2000 - Alabama

2000. This layer displays the legislative districts for the upper (Senate) chamber for the state. State legislative districts (SLDs) are the areas from w...

48. UA Census Tracts, 2000 - Alabama

2000. This datalayer displays Census Tracts for the state, based on boundaries established on January 1, 2000. Census tracts are small, relatively perman...

49. UA Census Traffic Analysis Zones, 2000 - Alabama

2000. Traffic analysis zones (TAZs) are special-purpose geographic entities delineated by state and local transportation officials for tabulating traffic...

50. UA Census Unified School Districts, 2000 - Alabama

2000. This datalayer displays the Unified School Districts for the entire state. A unified school district is inclusive of kindergarten through twelfth g...

51. UA Census Urbanized Areas, 2000 - Alabama

2000. This datalayer displays the Urbanized Areas (UAs) for the state based on a January 1, 2000 ground condition. Note that the Census Bureau made signi...

52. UA Census Voting Districts, 2000 - Alabama

2000. This datalayer displays the Voting Districts (VTDs) for the state based on a ground condition of January 1, 2000. Voting district (VTD) is the gene...

53. UA Census Water Bodies, 2000 - Alabama

2000. This datalayer displays water bodies throughout the state. This category includes lakes, ponds, bays, rivers, reservoirs and other water features. ...

54. UA Census Zip Code Tabulation Areas, 2000 - Alabama

2000. The polygons in this datalayer represent ZIP Code Tabulation Areas (ZCTAs) for the entire state. ZCTAs are a new statistical entity developed by th...

55. Unified School Districts, Alabama, 2000

2000. U.S. Census Bureau. Geography Division. This polygon shapefile represents the unified school district boundaries in Alabama. School districts are geographic entities within which state, c... U.S. Census Bureau. Geography Division.

56. American Indian Reservations, 1995 - Alabama

1995. This datalayer depicts feature location and other associated data for American Indian tribal entities in Alabama. Categories included here are: Ame...

57. Census Block Groups, 1995 - Alabama

1995. The polygons represent U.S. Census block groups within Alabama. A block group (BG) is a cluster of census blocks having the same first digit of the...

58. Census Blocks, 1995 - Alabama

1995. The polygons represent U.S. Census Blocks within Alabama. Census blocks are areas bounded on all sides by visible features, such as streets, roads,...

59. Census County Divisions and Minor Civil Divisions, 1995 - Alabama

1995. This datalayer displays the Census County Divisions and Minor Civil Divisions of Alabama. Census county divisions (CCDs) are county subdivisions th...

60. Census Landmark Polygon Features, 1995 - Alabama

1995. This datalayer displays polygon landmark features for the state of Alabama. "Landmark" is the general name given to a cartographic (or locational) ...

61. Census Metropolitan Statistical Areas, 1995 - Alabama

1995. This datalayer displays Metropolitan Statistical Areas (MSA) for the state of Alabama. Metropolitan statistical areas (MSAs) are metropolitan area...

62. Census School Districts, 1995 - Alabama

1995. This datalayer displays the school districts for the state of Alabama. School districts are geographic entities within which state, county, or loca...

63. Census Tracts, 1995 - Alabama

1995. This datalayer displays Census Tracts for the state of Alabama. Census tracts are small, relatively permanent statistical subdivisions of a county ...

64. Census Traffic Analysis Zones, 1995 - Alabama

1995. This datalayer displays the Traffic Analysis Zones (TAZ) for the state of Alabama. A traffic analysis zone (TAZ) is a statistical entity delineated...

65. Census Urbanized Areas, 1995 - Alabama

1995. This datalayer displays the Urbanized Areas (UAs) for the state of Alabama. The Census Bureau defines UAs as an area consisting of a central place(...

66. Census Voting Districts, 1995 - Alabama

1995. This datalayer displays the Voting Districts for the state of Alabama. A Voting District (VTD) is the generic name for a variety of geographic enti...

67. Congressional Districts, 1995 - Alabama

1995. The polygons represent Congressional districts (104th Congress) for the state of Alabama. Congressional districts (CDs) are the 435 areas from whi...

68. Key Geographic Locations, 1995 - Alabama

1995. This datalayer displays the key geographic locations (KGLs), as definded by the US Census Bureau, for the state of Alabama. Essential attribute dat...

69. Geologic Units (Polygons): Geology of the Conterminous United States, 2005

1994. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This polygon shapefile shows the boundaries of geologic units within the United States. This layer is part of the Geologic Map of the United States... Geological Survey (U.S.).

70. Census Counties, 1990- Alabama

1990. This datalayer displays the counties of the state of Alabama, based on a ground condition of January 1, 1990. The primary legal divisions of most s...

71. Census County Divisions and Minor Civil Divisions, 1990 - Alabama

1990. This datalayer displays the Census County Divisions and Minor Civil Divisions of Alabama based on the 1990 Census. Census county divisions (CCDs) a...

72. Census Place, 1990 - Alabama

1990. This datalayer displays the Census Places for the state of Alabama based on the ground condition of January 1, 1990. Places, for the reporting of d...

73. County Boundaries of the United States, 1990

1990. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

74. Spread of Africanized Honey Bees in the United States, 1990-2005

1990. United States. Agricultural Research Service. This polygon shapefile portrays the spread, by year, of the Africanized honey bee (AHB) in the United States, Puerto Rico, and the U.S. Virgin Isla... National Atlas of the United States.

75. UA Census American Indian Reservations, 1990 - Alabama

1990. This datalayer depicts feature location and other associated data for American Indian tribal entities for those entities established on January 1, ...

76. UA Census Block Groups, 1990 - Alabama

1990. The polygons represent U.S. Census Block Groups for the state based on the ground condition of January 1, 1990. Block Groups (BGs) are clusters of ...

77. UA Census Blocks, 1990 - Alabama

1990. The polygons in this datalayer represent U.S. Census Blocks for the entire state. Census blocks are statistical areas bounded on all sides by visib...

78. UA Census Congressional Districts, 1990 - Alabama

1990. The polygons represent Congressional Districts for the state based on the boundaries established on January 1, 1990. Congressional districts are th...

79. UA Census Counties, 1990 - Alabama

1990. This datalayer displays the counties for the state, based on a ground condition of January 1, 1990. The primary legal divisions of most states are ...

80. UA Census County Subdivisions, 1990 - Alabama

1990. This datalayer displays County Subdivisions for the state, based on legal and statistical entities established on January 1, 1990. County subdivisi...

81. UA Census Places, 1990 - Alabama

1990. This datalayer displays the Census Places for the state based on the ground condition of January 1, 1990. Places, for the reporting of decennial ce...

82. UA Census Tracts, 1990 - Alabama

1990. This datalayer displays Census Tracts for the state, based on entity boundaries established on January 1, 1990. Census tracts are small, relatively...

83. UA Census Urbanized Areas, 1990 - Alabama

1990. This datalayer displays the Urbanized Areas (UAs) for the state based on a January 1, 1990 ground condition. Note that the Census Bureau made signi...

84. Engineering Aspects of Karst

1984. Tobin, B. D. and Weary, David J. This polygon shapefile is a digital version of U.S. Geological Survey Open File Report 2004-1352, Engineering Aspects of Karst. The open-file repor... National Atlas of the United States.

85. County Boundaries of the United States, 1980

1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

86. Federal Lands of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of... National Atlas of the United States.

87. National Wilderness Preservation System of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains National Wilderness Preservation System areas of 640 acres or more, in the United States, Puerto Rico, and the U.S.... National Atlas of the United States.

88. State Boundaries of the United States, 2005

1972. Geological Survey (U.S.). This polygon shapefile portrays the state boundaries of the United States, and the boundaries of Puerto Rico and the U.S. Virgin Islands. The map l... Geological Survey (U.S.).

89. Time Zones of the United States, 2005

1972. National Atlas of the United States. This polygon shapefile portrays the time zones of the United States, Puerto Rico, and the U.S. Virgin Islands. Also included are the Greenwich Mean... National Atlas of the United States.

90. Current Distributions of Selected Amphibians in the United States, 1941-2000

1941. Lannoo, Michael J., Blackburn, Laura, and Nanjappa, Priya. This polygon shapefile portrays the distribution of 10 selected amphibians in the United States, based on historical literature and museum records ... National Atlas of the United States.

91. Civil War Southern States : County Boundaries, ca. 1864

1864. County borders during the US Civil War in the Confederate States. Vector data extracted from digital map provided by the Library of Congress at htt...

92. Civil War Southern States : Islands, ca. 1864

1864. Coastal islands during the US Civil War in the Confederate States. Vector data extracted from digital map provided by the Library of Congress at ht...

93. Civil War Southern States : State Boundaries, ca. 1864

1864. State boundaries during the US Civil War in the Confederate States. Vector data extracted from digital map provided by the Library of Congress at h...